bannister



(No Model.) 2 Sheets-Sheet 2.

J. BANNISTER. A CLAMP FOR MOLDERS USE.

Patented Feb. 18, 1896.

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UNITED STATES AATENT OFFICE.

JOHN BANNISTER, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO THE COULTER &MCKENZIE MACHINE COMPANY, OF SAME PLACE.

CLAMP FOR MOLDERS USE.

SPECIFICATION forming part of Letters Patent No. 554,972, dated February18, 1896.

Application filed September 9, 1895. Serial No- 561,8'73. (N0 model.)

To aZZ whom it may concern:

Be it known that I, JOHN BANNISTER, a citizen of the United States, anda resident of Bridgeport, in the county of Fairfield and State ofConnecticut, have invented certain new and useful Improvements inDevices for Securing Bars in Position in a Mold, of which the followingis a specification.

This invention relates to new and useful means for securing hardmetallic bars in position within a mold while other metal is bein g castthereto.

It is the object of my invention to provide a simple and efficientdevice whereby steel rods or bars may be securely held in any desiredposition with relation to the mold while molten metal is cast therein.

In the construction of various devices it is often desirable to formdifferent portions of the parts thereof from different grades ofmetalsuch, for instance, as steel and castiron. This is done by firstproperly preparing the steel pieces for said portions and then placingthem in the mold in their respective proper positions, then pouring in.the molten cast metal in such a manner as to engage said steel pieces,thus uniting the two.

The above manner of manufacturing is carried out in the production ofVises and similar articles wherein their wearing-surfaces are formed ofsteel and the remaining unimportant portions are formed of cast-iron.

Upon the accompanying drawings, which form a part of this specification,the same letters of reference denote like or corresponding parts uponthe several figures, and of which--- Figure 1 shows a perspective viewof a vise, the front or male part of which is constructed by theassistance of my invention. Fig. 2 is a front elevation of a clamp,having the parallel bars of the front part of a vise secured therein,and also shows in connection therewith the pattern for forming the moldin which the molten metal is poured. Fig. 3 is a rear Fig. 4 is adetached view of the pattern for the front part of a jaw, shown in Figs.2 and 3. Fig. 5 is a sectional view through the mold, showing the steelbars and clamp therefor embedded in the sand thereof, the upper ends ofsaid bars projecting into the mold for the cast metal. Fig. 6 is asectional view on line 6 6 of Fig. 5. Fig. 7 is a front elevationsimilar to Fig. 2 but showing a modified form of clamp, the same adaptedfor but one bar.

Referring to the drawings, A indicates the front part of a vise. B and Crepresent the upper and lower slide-bars thereof respect ively. Saidbars in this instance are made of steel so as to better stand the wear,while the front part is cast thereto of gray iron.

The feature of casting gray iron to steel is not new in constructingjaws for Vises, yet it is unsuccessful in many instances owing to thedifficulty to retain said steel pieces in their respective and properpositions with relation to each other and the mold aforesaid. I haveaccordingly devised in connection with the pattern D for said castingsuitable means whereby the steel bars thereof are securely retained atany angle with relation to each other and with relation to the patternand mold therefor. Said means consist first in forming a specialclamping device for retaining the bars shown, consisting of a baseportion E, having the parallel shoulders F F upon each side thereof, anda threaded bore G central therewith adapted to receive the threadedportion of a clamping-screw H. Around this clamping-screw is placed anintermediate plate I, having slightly-depending surfaces J upon eachside.

The above-described shoulders and engaging surfaces may be made of anydesired shape so as to accommodate the special shape of the bars or rodsto be held therein, or, in fact, the entire clamp may be varied at willwithout departing from the gist of my invention.

In connection with the above clamp I provide means whereby the same issecurely retained in any desired position with relation to the patternand-mold made by said pattern after said pattern has been withdrawn fromthe sand. Said device is designed as simple as possible, and consistsfirst in providing in the top of the clamp a suitable bore K and uponthe under side of the pattern D for the jaw a depending pin L at aproper angle thereto to engage said bore K of the clamp beforementioned, which pattern also serves to form a print for core incasting; or, if desired, I may form the bore in the pattern and the pinupon the clamp, as shown in Fig. 7 of the drawings. It is obvious fromthe nature of the front jaw (shown in the drawings) that the s1ide-barsformed therein should be formed at apcrfect right angle to the jawproper, and also that said bars should be so formed parallel to eachother as to insure the free movement of said bars in and out of thefemale part of the vise.

It will be obvious to those skilled in the art that the manner of usingmy clamp and casting the front part of a jaw by the assistance thereofis practically as follows: The bars 13 and C are placed within the clampagainst the shoulders F F and secured therein by means of thethumb-scrcwl'l, after which the pattern I) is attached thereto in themanner illustrated in Figs. 2 and 3. In this condition the parts are putin the bottom flask and the sand packed therein, the top of the patternbeing kept even with the top of the flask, thus bringing the line ofseparation M of the upper and lower flask portions even with the top ofsaid pattern I). The top portion of the flask is next placed in positionand the sand packed therein, after which the top flask and its contentsare removed and the pattern D withdrawn from the sand of the lowerflask. The top flask is again placed in position forming the mold,practically as shown in Fi 5 of the drawings, which shows the same readyto receive the molten metal through the gate 0.

In this my invention I do not wish to confine myself to the exactconstruction shown in the drawings for retaining the bars in position,as the same may be Varied without departing from the principle thereof.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. I11 a device of the class described, the combination with the patternfor molding the front part of a vise, of a pin depending there from, abase adjacent thereto adapted to be engaged by said pin, a clampingscrewfitted to said base, and adapted to engage metallic bars and retain thesame at a right angle with relation to the pattern aforesaid.

2. In a device of the class described, the combination with a pattern,of a base having parallel shoulders thereon, a clamping-screw betweensaid shoulders, an intermediate plate around said screw to engagemetallic bars and retain the same against said shoulders, means forretaining said bars in their proper position with relation to thepattern aforesaid.

Signed at Bridgeport, in the county of Fairfield and State ofConnecticut, this 5th day of September, A. D. 1895.

JOHN BANNIWIER.

\Vitnesses:

Enw. J. MORGAN, (J. M. NEWMAN.

